iodine is the reason for sweating. at least when you are deficient you lose the ability. its a really good sign. some toxins only come out that way. the stink will lessen as more toxins come out, providing your diet is not replenishing them as fast as you get them out.
giving blood is also a metabolism booster. its one of the cheapest health protocols i know and it works. the bloodletters of the past were not completely stupid, they just over did it from time to time, like with george washington.